Crystal structure and charge order below the metal-insulator transition in the vanadium bronze $β$-SrV$_6$O$_{15}$

Claire Sellier; Florent Boucher; Etienne Janod

doi:10.1016/S1293-2558(03)00045-1

paper

Crystal structure and charge order below the metal-insulator transition in the vanadium bronze $β$ -SrV $_{6}$ O $_{15}$

arXiv:cond-mat/0302476 · doi:10.1016/S1293-2558(03)00045-1

Abstract

Single crystal X-ray diffraction measurements were performed on one-dimensional mixed valence vanadium bronze $β$ -SrV $_{6}$ O $_{15}$ in which a metal-insulator transition exists at 170 K. Above 170 K the P2 $_{1}$ /a structure with zigzag order of Sr in the tunnels of vanadium is confirmed. In the structure below 170 K, the P2 $_{1}$ /a space group is retained with a b-axis threefold increase and a charge order appears. A Bond Valence Sum analysis shows that the charge order may consist in clusters of V $^{4 +}$ regularly spaced along 1D direction.

8 pages ; to be published in Solid State Science

Crystal structure and charge order below the metal-insulator transition in the vanadium bronze β-SrV6​O15​

Abstract

Crystal structure and charge order below the metal-insulator transition in the vanadium bronze $β$ -SrV $_{6}$ O $_{15}$